I have to say I agree. 9 people out of 10 when using a *24-inch* desktop monitor will zoom and maximize every window, every time.
Also, 97% of all statistics used in arguments are made up.
Look at how many people out there have two monitors on their desktops. I bet it is more than 10%. That kind of shows a fallacy in your argument about people not wanting multiple windows. Almost every computer at my work is set up with two screens. The increased productivity makes the (minor) cost worth it.
Why have two windows?
Solid works on the left, documentation or pdf schematics on the right.
Word on the left, power point on the right.
I feel crippled without two screens.
Microsoft has the handy WIN-LEFT and WIN-RIGHT feature that automatically uses half of the available screen space for a given program, which is a quick handy way to run two programs on the same screen. I really wish Apple did the same. Even on my MBA11, there are a lot of times I want to split the screen, and dragging stuff around and resizing it is cumbersome.
Back OT, the lack of multi-window capability is one of the things that led to me abandoning iPads after several years of use... that and the purchase of a MBA11 that was almost as handy to carry around, and gave much better editing and viewing (including two programs on the same screen).
The OP really needs to think what he is using the iPad for. As a media consumption tool, multi-window doesn't give you a lot. Also, Samsung MW capability doesn't let you MW every app, only the stock ones on the tablet. Given, that probably covers most of what you want, but not everything. I would recommend you stop by BestBuy and play with it before you start thinking that MW is the killer app that makes the tablet worth buying. I suspect it is not (yes, I have two Samsung tablets, as well as 3 iPads).